JPS63252382A - Induction heating of flat plate - Google Patents
Induction heating of flat plateInfo
- Publication number
- JPS63252382A JPS63252382A JP62085582A JP8558287A JPS63252382A JP S63252382 A JPS63252382 A JP S63252382A JP 62085582 A JP62085582 A JP 62085582A JP 8558287 A JP8558287 A JP 8558287A JP S63252382 A JPS63252382 A JP S63252382A
- Authority
- JP
- Japan
- Prior art keywords
- flat plate
- main coil
- plate
- coil
- induction heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 title claims description 45
- 230000006698 induction Effects 0.000 title claims description 43
- 239000004020 conductor Substances 0.000 claims description 87
- 230000004907 flux Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 10
- 239000011295 pitch Substances 0.000 description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 2
- 241000252233 Cyprinus carpio Species 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
Ａ、産業上の利用分野
本発明は、板幅方向の温度分布を容易に調整できるとと
もに、平板の板幅が異なっても主コイルを交換すること
なく板幅方向での加熱を均一に行うことができる平板の
誘導加熱方法に関する。[Detailed Description of the Invention] A. Industrial Field of Application The present invention allows the temperature distribution in the width direction of a plate to be easily adjusted, and even if the width of the flat plate is different, it is possible to adjust the temperature distribution in the width direction without replacing the main coil. The present invention relates to an induction heating method for a flat plate that can uniformly heat a plate.
Ｂ１発明の概要
本発明は、平板を挾んで対向する一対の主コイル導体を
平板の長さ方向へ複数組配置して直交磁束形の主コイル
を構成する一方、平板を挾んで対向する二対の補助コイ
ル導体を平板の長さ方向へ一組以上配置して直交磁束形
の補助コイルを構成し、主コイル及び補助コイルに通電
しながら平板を搬送する平板の誘導加熱方法において、
平板の長さ方向での隣り合う主コイル導体間のピッチを
変えて誘導加熱を行うことにより、板幅方向の温度分布
を調整可能とし、これによって板幅の異なる平板を主コ
イルを交換することなく板幅方向へ均一に誘導加熱でき
るようにしたものである。B1 Summary of the Invention The present invention consists of a plurality of pairs of main coil conductors facing each other with a flat plate in between, which are arranged in the length direction of the flat plate to constitute an orthogonal magnetic flux type main coil. In a flat plate induction heating method in which one or more sets of auxiliary coil conductors are arranged in the length direction of the flat plate to constitute an orthogonal magnetic flux type auxiliary coil, and the flat plate is conveyed while energizing the main coil and the auxiliary coil,
By performing induction heating by changing the pitch between adjacent main coil conductors in the length direction of the flat plate, it is possible to adjust the temperature distribution in the width direction of the plate, making it possible to replace the main coil for flat plates with different widths. This enables induction heating to be performed uniformly in the width direction of the plate.
Ｃ１従来の技術
平板を搬送しながら誘導加熱する誘導加熱コイル装置と
して、第３図に示すものが提案されている。C1 Prior Art As an induction heating coil device for inductively heating a flat plate while conveying it, the one shown in FIG. 3 has been proposed.
この誘導加熱コイル装置は、平板ｌを挾んで配置される
とともに高周波又は中周波の電源２に接続された直交磁
束形の主コイル３と、平板１を挾んで配置されるととも
に電源４に接続された直交磁束形の補助コイル５とを平
板の搬送方向に配設して構成されている。This induction heating coil device includes a main coil 3 of an orthogonal magnetic flux type, which is arranged to sandwich a flat plate 1 and connected to a high-frequency or medium-frequency power source 2; auxiliary coils 5 of orthogonal magnetic flux type are disposed in the conveying direction of the flat plate.
主コイル３は、平板ｌを挾んで平板１の両面に対向して
平板１の板幅方向へ板幅Ｗを越えて延在する主コイル導
体６ａ〜６ｆを図のように配設し、これらの主コイル導
体間を接続するとともに電源２に接続し、主コイル導体
６ａ〜６ｆの背後に鉄心７を取り付けたものである。一
方、補助コイル５は、平板！を挾んで平板１の両面に対
向して平板１の板幅方向の両側縁の内側にて平板ｌの長
さ方向へ延在する補助コイル導体８ａ、８ｂを図のよう
に配設し、これらの補助コイル導体間を接続するととも
に電源４に接続し、補助コイル導体８λ、８ｂの背後に
鉄心９を取り付けたものである。The main coil 3 includes main coil conductors 6a to 6f, which are arranged as shown in the figure and extend across the width W of the flat plate 1 in the width direction of the flat plate 1, facing both sides of the flat plate 1. The main coil conductors 6a to 6f are connected to each other and connected to the power source 2, and an iron core 7 is attached behind the main coil conductors 6a to 6f. On the other hand, the auxiliary coil 5 is a flat plate! Auxiliary coil conductors 8a and 8b are arranged as shown in the figure and extend in the length direction of the flat plate 1 on the inside of both side edges of the flat plate 1 in the width direction of the flat plate 1, facing both sides of the flat plate 1. The auxiliary coil conductors 8λ and 8b are connected to each other and connected to the power source 4, and an iron core 9 is attached behind the auxiliary coil conductors 8λ and 8b.
なお、前述したように夫々の主コイル導体及び補助コイ
ル導体は平Ｅｌの裏側にも同一のものが位置する。Note that, as described above, the same main coil conductor and auxiliary coil conductor are also located on the back side of the flat El.
斯かる誘導加熱コイル装置により、主コイル３及び補助
コイル５に通電しながら例えば板幅Ｗが４００Ｒ３１の
平板を誘導加熱すると、第４図（ａ）に示すように平板
は板幅方向へ均一に誘導加熱される。When a flat plate having a width W of 400R31, for example, is heated by induction using this induction heating coil device while the main coil 3 and the auxiliary coil 5 are energized, the flat plate is heated uniformly in the width direction as shown in FIG. 4(a). Heated by induction.
なお、先に出願しである特願昭６１−１１８９３４号に
記載されているように平板ｌの主コイル３のみの加熱に
よる板幅方向の温度分布は第６図（ｂ）に示すような温
度分布となり、両端部の内側に生じた温度分布の谷部ｍ
、ｎに相当する部位が補助コイル５によって加熱される
ので、主コイル３及び補助コイル５を第３図に示すよう
に平板ｌの搬送方向に沿って配設して加熱することによ
って、主コイル３及び補助コイル５を通電して搬送され
た平板ｌは第４図（ａ）に示すように板幅方向に均一な
温度分布で誘導加熱される。Furthermore, as described in the previously filed Japanese Patent Application No. 118934/1983, the temperature distribution in the plate width direction due to the heating of only the main coil 3 of the flat plate l is as shown in FIG. 6(b). distribution, and the valley m of the temperature distribution that occurs inside both ends
, n are heated by the auxiliary coil 5, so by arranging the main coil 3 and the auxiliary coil 5 along the conveyance direction of the flat plate l as shown in FIG. 3 and the auxiliary coil 5, the flat plate 1 transported is heated by induction with a uniform temperature distribution in the width direction of the plate, as shown in FIG. 4(a).
Ｄ１発明が解決しようとする問題点
ところが、斯かる誘導加熱コイル装置を用いて例えば板
幅Ｗが小さい３００ｘｍの平板を誘導加熱する場合、主
コイル３を変えることなく板幅Ｗに応じて補助コイル５
のみを変えるか又は補助コイル導体８ａ、８ｂ間の距離
を変えて可能な限り調整しても、第４図（ｂ）に示すよ
うに平板の板幅方向の中央部の温度が低下するという問
題がある。D1 Problems to be Solved by the Invention However, when inductively heating a flat plate with a small plate width W of 300 x m using such an induction heating coil device, the auxiliary coil is changed according to the plate width W without changing the main coil 3. 5
Even if the distance between the auxiliary coil conductors 8a and 8b is adjusted as much as possible, the temperature at the center of the flat plate in the width direction decreases as shown in FIG. 4(b). There is.
従って、平板の板幅Ｗが異なる都度に主コイル３を交換
しないと板幅方向の温度を均一にすることができない。Therefore, unless the main coil 3 is replaced each time the plate width W of the flat plate differs, the temperature in the plate width direction cannot be made uniform.
このように同一の主コイルを用いて板幅の異なる平板を
誘導加熱すると板幅方向の温度分布が不均一になるのは
以下の理由による。The reason why the temperature distribution in the width direction of the plate becomes uneven when flat plates having different widths are heated by induction using the same main coil is as follows.
例えば第５図（ａ）に示すように背後に鉄心７を取り付
けた主コイル導体６ａ〜６ｆを平板ｌの両面に対向して
配設するとともにこれらの主コイル導体間を接続した直
交磁束形の主コイルｌＯを電源２に接続した誘導加熱コ
イル装置や、第５図（ｂ）に示すように背後に鉄心７を
取り付けた主コイル導体６ａ〜６ｄを平板ｌの両面に対
向して配設するとともにこれらの主コイル導体間を接続
した直交磁束形の主コイル１１を電源２に接続した誘導
加熱コイル装置（いずれも補助コイルなし）で平板１を
図中の矢印方向へ搬送しながら誘導加熱すると、夫々の
主コイル導体には矢印方向の電流Ｉが流れると同時に平
板ｌには誘起電流ｉが流れ、平板ｌが加熱される。この
際の平板ｌの板幅方向の温度分布は第６図（ｂ）のよう
になる。For example, as shown in Fig. 5(a), main coil conductors 6a to 6f with an iron core 7 attached behind them are arranged facing each other on both sides of a flat plate l, and these main coil conductors are connected to each other in an orthogonal magnetic flux type. An induction heating coil device in which the main coil lO is connected to the power source 2, and main coil conductors 6a to 6d with the iron core 7 attached to the back as shown in FIG. 5(b) are arranged facing each other on both sides of the flat plate l. When the flat plate 1 is conveyed in the direction of the arrow in the figure and heated by induction using an induction heating coil device (none of which has an auxiliary coil), the main coil 11 of the orthogonal magnetic flux type connected between these main coil conductors is connected to the power source 2. , a current I flows in the direction of the arrow in each main coil conductor, and at the same time an induced current i flows in the flat plate l, heating the flat plate l. At this time, the temperature distribution in the width direction of the flat plate l is as shown in FIG. 6(b).
ところで、斯かる誘導加熱コイル装置において、平板ｌ
の板幅Ｗを変えることなく第５図（ａ）又は第５図（ｂ
）の主コイル導体間のピッチＰを小さくすると第６図（
ａ）に示すように平板ｌの両側の温度が中央部に比較し
て低くなり、逆にピッチＰを大きくすると第６図（ｃ）
に示すように平板ｌの両側の温度が中央部よりも上昇す
ることが判明した。これは以下の理由による。平板１の
板幅方向の温度分布が第６図（ａ）、（ｂ）、（ｃ）と
なるときの誘起電流の循環流路は第７図（ａ）。By the way, in such an induction heating coil device, the flat plate l
Figure 5(a) or Figure 5(b) without changing the plate width W of
) If the pitch P between the main coil conductors of ) is decreased, Figure 6 (
As shown in a), the temperature on both sides of the flat plate l becomes lower than that in the center, and conversely, when the pitch P is increased, the temperature on both sides of the flat plate l becomes lower as shown in Fig. 6(c).
As shown in Figure 2, it was found that the temperature on both sides of the flat plate 1 was higher than that at the center. This is due to the following reasons. The circulation flow path of the induced current when the temperature distribution in the width direction of the flat plate 1 is as shown in FIGS. 6(a), (b), and (c) is shown in FIG. 7(a).
（ｂ）、（ｃ）であり、第７図（ａ）、（ｂ）。(b) and (c), and Fig. 7 (a) and (b).
（ｃ）では、平板１の板幅Ｗは一定であるために板幅方
向へ流れる誘起電流ｉの流路長に変化はないが、ピッチ
Ｐが小さいほど第７図（ａ）に示すように平板１の両側
での平板１の長さ方向の流路長が短くなり従って加熱さ
れる距離が短くなるので、第６図（ａ）に示すように平
板１の中央部に比較して両側での温度上昇が少なくなる
。また逆にピッチＰが大きいほど第７図（ｃ）に示すよ
うに平板１の両側での平板１の長さ方向の流路長が大き
くなり加熱される距離がより多くなるので第６図（ｃ）
に示すように平板ｌの両側の温度が中央部より高くなる
。なお、第５図（ａ）、第５図（ｂ）に示した主コイル
導体は鉄心を取り付けであるが、これらの鉄心は加熱効
率を高めるために設けたものであり、これらの鉄心を設
けない場合にも温度分布について上記と全く同様な結果
が得られた。In (c), since the plate width W of the flat plate 1 is constant, there is no change in the flow path length of the induced current i flowing in the plate width direction, but as the pitch P becomes smaller, as shown in FIG. 7(a), The flow path length in the longitudinal direction of the flat plate 1 on both sides of the flat plate 1 is shortened, and therefore the distance to be heated is shortened, so that the flow path length on both sides of the flat plate 1 is shorter than that at the center of the flat plate 1, as shown in FIG. 6(a). temperature rise is reduced. Conversely, as the pitch P becomes larger, as shown in FIG. 7(c), the flow path length in the longitudinal direction of the flat plate 1 on both sides of the flat plate 1 becomes larger, and the distance to be heated increases. c)
As shown in , the temperature on both sides of the flat plate l becomes higher than that at the center. Note that the main coil conductors shown in Figures 5(a) and 5(b) have iron cores attached, but these iron cores are provided to increase heating efficiency. Even in the absence of such a temperature distribution, the same results as above were obtained regarding the temperature distribution.
以上は平板の板幅を一定にして主コイル導体のピッチを
変えた場合の板幅方向の温度変化の説明であるが、主コ
イル導体のピッチを一定にして平板の板幅を変えた場合
も平板の幅方向と長さ方向での誘起電流の流路長の比率
が相対的に異なることとなるため、板幅方向での温度分
布が変動する。The above is an explanation of the temperature change in the plate width direction when the pitch of the main coil conductor is changed while keeping the width of the flat plate constant. However, it also applies when the pitch of the main coil conductor is kept constant and the width of the flat plate is changed. Since the ratio of the flow path length of the induced current in the width direction and the length direction of the flat plate is relatively different, the temperature distribution in the width direction of the plate fluctuates.
つまり、板幅Ｗを大きくすると平板の中央部の温度が上
がって両側の温度が相対的に下がり、第６図（ａ）に類
似する温度分布となる。逆に、板幅Ｗを小さくすると中
央部の温度が相対的に下がって第６図（ｃ）に類似する
温度分布となる。このように板幅を変えると主コイルに
よって誘導加熱される際の板幅方向の温度分布が変動す
るため、同一の主コイルをそのままで用いたのでは第３
図のように主コイルと補助コイルを平板の搬送方向に沿
って配設し、補助コイル導体８ａ、８ｂの間隔を平板１
の板幅に合わせて調整しても板幅方向での温度を第４図
（ａ）に示したように均一に誘導加熱することができず
に第４図（ｂ）に示したように不均一な温度分布となっ
てしまう。That is, when the plate width W is increased, the temperature at the center of the flat plate increases and the temperature on both sides relatively decreases, resulting in a temperature distribution similar to that shown in FIG. 6(a). On the other hand, if the plate width W is made smaller, the temperature at the center will be relatively lowered, resulting in a temperature distribution similar to that shown in FIG. 6(c). When the plate width is changed in this way, the temperature distribution in the width direction of the plate changes when induction heating is performed by the main coil, so if the same main coil is used as is, the third
As shown in the figure, the main coil and the auxiliary coil are arranged along the conveyance direction of the flat plate, and the interval between the auxiliary coil conductors 8a and 8b is set at the flat plate 1.
Even if the temperature was adjusted according to the width of the plate, the temperature in the width direction of the plate could not be uniformly induction heated as shown in Figure 4(a), and problems occurred as shown in Figure 4(b). This results in a uniform temperature distribution.
そこで本発明は斯かる問題を解決した平板の誘導加熱方
法を提供すること目的とする。Therefore, an object of the present invention is to provide a method for induction heating a flat plate that solves such problems.
Ｅ０問題点を解決するための手段
斯かる目的を達成するための本発明の構成は、搬送ライ
ンに沿って搬送される長尺な平板の板幅方向へ板幅を越
えて延在するとともに平板を挾んで対向する一対の主コ
イル導体を平板の長さ方向へ複数組配置して直交磁束形
の主コイルを構成する一方、平板の板幅方向の両側縁の
内側にて平板の長さ方向へ延在するとと６に平板を挾ん
で対向する二対の補助コイル導体を平板の長さ方向へ一
組以上配置して直交磁束形の補助コイルを構成し、主コ
イルと補助コイルとを平板の搬送方向に沿って配設する
とともに主コイル及び補助コイルに通電しながら平板を
搬送する平板の誘導加熱方法において、
平板の長さ方向での隣り合う前記主コイル導体間のピッ
チを変化させることにより、平板の板幅方向の中央部と
両側部の温度を相対的に調整できるので、これによって
板幅の異なる平板を板幅方向へ均一に加熱できるように
したことを特徴とする。Means for Solving the E0 Problem The configuration of the present invention for achieving the above object is such that the structure of the present invention extends beyond the width of the long flat plate in the width direction of the long flat plate conveyed along the conveyance line, and A plurality of pairs of main coil conductors facing each other are arranged in the length direction of the flat plate to form an orthogonal magnetic flux type main coil. Two or more pairs of auxiliary coil conductors facing each other with a flat plate in between are arranged in the length direction of the flat plate to constitute an orthogonal flux type auxiliary coil, and the main coil and the auxiliary coil are connected to the flat plate. In a flat plate induction heating method in which the flat plate is conveyed while energizing the main coil and the auxiliary coil while being arranged along the conveying direction of the flat plate, the pitch between adjacent main coil conductors in the length direction of the flat plate is changed. This makes it possible to relatively adjust the temperature of the central part and both sides of the flat plate in the width direction, thereby making it possible to uniformly heat flat plates of different widths in the width direction.
Ｆ０作用
平板の誘導加熱に際して、主コイルにおける主コイル導
体間のピッチを小さくすると平板の中央部の温度上昇が
相対的に両側部での温度上昇より大となり、反対に主コ
イル導体間のピッチを大きくすると平板の両側部の温度
上昇が相対的に中央部での温度上昇より大となるので、
主コイル導体間のピッチを変えることにより中央部と両
側部での温度が相対的に調節される。F0 action When inductively heating a flat plate, if the pitch between the main coil conductors in the main coil is reduced, the temperature rise in the center of the plate will be relatively larger than the temperature rise on both sides; If it is increased, the temperature rise on both sides of the plate will be relatively larger than the temperature rise in the center, so
By varying the pitch between the main coil conductors, the relative temperatures in the center and on both sides can be adjusted.
従ってまた平板の板幅を基準の値より大きくすると、板
幅方向への誘起電流の流路長が長くなって相対的に両側
の温度が低くなり、この場合は平板の長さ方向での主コ
イル導体のピッチを大きくして平板の両側での平板の長
さ方向の流路長を長くすれば、両側の温度が高くなって
平板の板幅方向の温度が均一となる。Therefore, if the width of the flat plate is made larger than the standard value, the flow path length of the induced current in the width direction of the plate becomes longer, and the temperature on both sides becomes relatively lower. If the pitch of the coil conductors is increased to increase the length of the flow path in the longitudinal direction of the flat plate on both sides of the flat plate, the temperature on both sides becomes higher and the temperature in the width direction of the flat plate becomes uniform.
逆に平板の板幅を基準の値よりも小さくすると、板幅方
向への誘起電流の流路長が短くなって相対的に両側の温
度が高（なり、この場合は平板の長さ方向での主コイル
導体のピッチを小さくして平板の両側での平板の長さ方
向の流路長を小さくすれば、両側の温度が低くなって平
板の板幅方向での温度が均一となる。On the other hand, if the width of the flat plate is made smaller than the standard value, the flow path length of the induced current in the width direction of the plate becomes shorter, and the temperature on both sides becomes relatively high. By reducing the pitch of the main coil conductors of the flat plate to reduce the flow path length in the longitudinal direction of the flat plate on both sides of the flat plate, the temperature on both sides becomes lower and the temperature in the width direction of the flat plate becomes uniform.
Ｇ、実施例
以下、本発明を図面に示す第１実施例、第２実施例に基
づいて説明する。なお、本発明は、主コイルと補助コイ
ルとからなる誘導加熱コイル装置における主コイル導体
どうしのピッチを変えて平板を誘導加熱するので、ピッ
チを変えることができる誘導加熱コイル装置を第１実施
例、第２実施例として説明する。G. Examples The present invention will be described below based on a first example and a second example shown in the drawings. In addition, since the present invention inductively heats a flat plate by changing the pitch between the main coil conductors in an induction heating coil device consisting of a main coil and an auxiliary coil, the first embodiment provides an induction heating coil device that can change the pitch. , will be explained as a second embodiment.
第１実施例の誘導加熱コイル装置を第１図（ａ）。FIG. 1(a) shows the induction heating coil device of the first embodiment.
（ｂ）に示す。この誘導加熱コイル装置は、平板ｌを挾
んで対向するとともに第５図（、）に示す主コイル１０
と類似した形状の直交磁束形の主コイル１３と、平板ｌ
を挾んで対向する二対で一組の直交磁束形の補助コイル
１４とから構成されている。Shown in (b). This induction heating coil device has main coils 10 facing each other with a flat plate l in between, and shown in FIG.
A main coil 13 of orthogonal magnetic flux type having a shape similar to that of
It consists of two pairs of orthogonal magnetic flux type auxiliary coils 14 that face each other with the magnetic flux in between.
主コイル１３は、搬送ラインに沿って搬送される長尺な
平板ｌの板幅方向へ板幅Ｗを越えて延在子る主コイル導
体１５ ａ ＝ ｌ ５ ｆと、主コイル導体１５ａ〜
１５ｆの背後に取り付けられた鉄心７と、主コイル導体
１５ａ〜１５ｆの平板１の長さ方向でのピッチＰ、〜Ｐ
３を変え得るように主コイル導体１５ａ−１５ｆの間を
接続するとともに電源２に接続するための固定導体１６
ａ〜１６ｇとから構成されている。The main coil 13 includes a main coil conductor 15 a = l 5 f extending beyond the plate width W in the plate width direction of the long flat plate l conveyed along the conveyance line, and main coil conductors 15 a to 15 f.
Pitch P in the length direction of flat plate 1 between iron core 7 attached behind 15f and main coil conductors 15a to 15f, ~P
A fixed conductor 16 for connecting between the main coil conductors 15a-15f and connecting to the power supply 2 so that the main coil conductors 15a to 15f can be changed.
It is composed of a to 16g.
一方、補助コイル１４は、主コイル導体１５ｃ。On the other hand, the auxiliary coil 14 has a main coil conductor 15c.
１５ｄ間において平板ｌの板幅方向の両側縁の内側で平
板１の長さ方向へ伸びる２本の補助コイル導体１７ ａ
、 ｌ ７ ｂと、この補助コイル導体１７ａ、１７
ｂの背後に取り付けた鉄心９と、補助コイル導体１７ａ
、１７ｂの間隔を変え得るように補助コイル導体１７ａ
、１７ｂの間を接続するとともに電源４に接続するため
の固定導体１８ａ〜１８ｃとから構成されている。Two auxiliary coil conductors 17a extend in the length direction of the flat plate 1 between the edges of the flat plate 1 in the width direction of the flat plate 15d.
, l 7 b and this auxiliary coil conductor 17a, 17
Iron core 9 attached behind b and auxiliary coil conductor 17a
, 17b so that the distance between the auxiliary coil conductors 17a and 17b can be changed.
, 17b and fixed conductors 18a to 18c for connecting to the power source 4.
固定導体１６ａ〜１６ｇに対する主コイル導体１５ａ＝
１５ｆ及び固定導体１８ ａ −１８ｃに対する補助コ
イル導体１７ａ、１７ｂの結合構造を第１図（ｂ）に示
す。即ち、固定導体１６ａ〜１６ｇ、１８ａ〜１８ｃに
はその長さ方向へ長孔１９が形成され、主コイル導体ｔ
５ａ〜１５ｆ及び補助コイル導体１７ａ、１７ｂの端部
へ挿通したボルト２０を長孔１９へ挿通し、ボルト２０
に図示しないナツトが螺合されている。Main coil conductor 15a for fixed conductors 16a to 16g=
The coupling structure of the auxiliary coil conductors 17a and 17b to the fixed conductors 15f and the fixed conductors 18a to 18c is shown in FIG. 1(b). That is, long holes 19 are formed in the fixed conductors 16a to 16g, 18a to 18c in the length direction thereof, and the main coil conductor t
5a to 15f and the ends of the auxiliary coil conductors 17a and 17b are inserted into the elongated holes 19, and the bolts 20 are inserted into the elongated holes 19.
A nut (not shown) is screwed together.
上記の主コイル１３及び補助コイル１４は平板ｌの反対
側にも設けられている各コイル導体とで夫々一体に構成
されている。The main coil 13 and the auxiliary coil 14 described above are each integrally constructed with respective coil conductors provided on the opposite side of the flat plate 1.
次に、誘導加熱コイル装置の第２実施例を第２図に示す
。この誘導加熱コイル装置は、平板ｌを挾んで対向する
とともに第５図（ｂ）に示す主コイル１１と類似した形
状の直交磁束形の主コイル２２と、平［１を挾んで対向
する二対で一組の直交磁束形の補助コイル２３とから構
成されている。Next, a second embodiment of the induction heating coil device is shown in FIG. This induction heating coil device consists of two pairs of orthogonal flux type main coils 22 which face each other with a flat plate l in between and have a similar shape to the main coil 11 shown in FIG. and a set of orthogonal magnetic flux type auxiliary coils 23.
主コイル２２は、搬送ラインに沿って搬送される長尺な
平板ｌの板幅方向へ板幅Ｗを越えて延在する主コイル導
体２４ａ〜２４ｄと、主コイル導体２４ａ〜２４ｄの背
後に取り付けられた鉄心７と、主コイル導体２４ａ〜２
４ｄの平板１の長さ方向でのピッチＰ、−Ｐ、を変える
ように主コイル導体２４ａ〜２４ｄの間を接続するとと
もに電源２に接続するための固定導体２５ａ〜２５ｅと
から構成されている。The main coil 22 is attached to main coil conductors 24a to 24d that extend in the width direction of a long flat plate l that is conveyed along a conveyance line beyond the plate width W, and to the back of the main coil conductors 24a to 24d. The iron core 7 and the main coil conductors 24a to 2
It is composed of fixed conductors 25a to 25e for connecting main coil conductors 24a to 24d so as to change the pitches P and -P in the length direction of the flat plate 1 of 4d, and for connecting to the power source 2. .
一方、補助コイル２３は、主コイル２２よりも平板１の
搬送方向下流側に位置し、平板１の板幅方向の両側縁の
内側にて両側縁に対して傾斜した状態で平板ｌの長さ方
向へ伸びる２本の補助コイル導体２６ａ、２６ｂと、補
助コイル導体２６ａ。On the other hand, the auxiliary coil 23 is located downstream of the main coil 22 in the conveyance direction of the flat plate 1, and is located inside both side edges of the flat plate 1 in the plate width direction and is inclined with respect to both side edges for the length of the flat plate l. Two auxiliary coil conductors 26a, 26b extending in the direction, and auxiliary coil conductor 26a.
２６ｂの背後に取り付けた鉄心９と、補助コイル導体２
６ａ、２６ｂのピッチを変え得るように補助コイル導体
２６ａ、２６ｂの間を接続するとともに電源４に接続す
るための固定導体２７ａ〜２７ｃとから構成されている
。Iron core 9 attached behind 26b and auxiliary coil conductor 2
It is comprised of fixed conductors 27a to 27c for connecting between the auxiliary coil conductors 26a and 26b and to the power supply 4 so that the pitch of the coil conductors 6a and 26b can be changed.
これらの主コイル導体２４ａ〜２４ｄ及び補助コイル導
体２６ａ、２６ｂと固定導体２５ａ〜２５ｅ、２７ａ〜
２７ｃとの結合部も第１図（ｂ）と同じであり、主コイ
ル２２及び補助コイル２３は平板ｌの反対側にも設けら
れている各コイル導体とで夫々一体に構成されている。These main coil conductors 24a-24d, auxiliary coil conductors 26a, 26b, and fixed conductors 25a-25e, 27a-
The connecting portion with 27c is also the same as that shown in FIG. 1(b), and the main coil 22 and the auxiliary coil 23 are each integrally formed with each coil conductor provided on the opposite side of the flat plate l.
次に、本発明による平板の誘導加熱方法を、第１図に示
す誘導加熱コイル装置を用いて説明する。Next, a method for induction heating a flat plate according to the present invention will be explained using an induction heating coil device shown in FIG.
平板を誘導加熱するには電Ｒ２，４から主コイル１３、
補助コイル１４へ電流を流しながら、平板ｌを矢印の方
向へ搬送する。To inductively heat a flat plate, connect the main coil 13 from the electric R2, 4,
While applying current to the auxiliary coil 14, the flat plate l is conveyed in the direction of the arrow.
平板１の板幅方向に均一な温度分布で加熱したいにもか
かわらず、中央部と両側部の温度が均一でない場合には
、主コイル１３の主コイル導体１５ ａ ＝ ｌ ５
ｆのピッチＰ、−Ｐ、のずべてかまたはいずれかの一部
を小さくかまたは大きくするように移動・調節すること
によって平板１の中央部と両側部の温度上昇を相対的に
調整し、均一な温度分布となるようにして誘導加熱する
ものである。Even though it is desired to heat the flat plate 1 with a uniform temperature distribution in the plate width direction, if the temperature at the center and both sides is not uniform, the main coil conductor 15 of the main coil 13 a = l 5
By moving and adjusting all or part of the pitches P and -P of f to be smaller or larger, the temperature rise in the center and both sides of the flat plate 1 is relatively adjusted, Induction heating is performed to achieve a uniform temperature distribution.
また主コイル導体１５ａ−１５ｆのピッチＰ１〜Ｐ、を
変更することによって故急に平板ｌの中央部または両側
部の温度が高くなるように調整して誘導加熱することら
容易である。Furthermore, by changing the pitches P1 to P of the main coil conductors 15a to 15f, it is easy to adjust the temperature of the center or both sides of the flat plate 1 so that it suddenly becomes high for induction heating.
また板幅Ｗの異なる平板ｌを誘導加熱するには、補助コ
イル１４の補助コイル導体１７ａ、１７ｂの間隔を板幅
Ｗに合わせて移動するか又は補助コイル１４のみを交換
する一方、主コイル１３の主コイル導体１５ａ＝１５ｆ
のピッチＰ、〜Ｐ、を変更し、板幅方向での温度が均一
となるように調整したのちに誘導加熱を行えばよい。主
コイル導体どうしのピッチを変えることにより板幅Ｗが
異なっても板幅方向へ均一に加熱できるが、板幅Ｗが既
存の主コイル、補助コイルで対処可能な範囲を越えた場
合は、従来と同様に主コイルの交換が必要になる。In addition, in order to inductively heat flat plates l with different plate widths W, the interval between the auxiliary coil conductors 17a and 17b of the auxiliary coil 14 should be moved to match the plate width W, or only the auxiliary coil 14 should be replaced, while the main coil 13 main coil conductor 15a=15f
The induction heating may be performed after changing the pitches P, ~P, and adjusting the temperature in the width direction of the plate to be uniform. By changing the pitch between the main coil conductors, even if the plate width W is different, heating can be done uniformly in the width direction of the plate, but if the plate width W exceeds the range that can be handled by the existing main coil and auxiliary coil, Similarly, the main coil will need to be replaced.
主コイル導体１５１〜１５ｆ、補助コイル導体１７ａ、
１７ｂのピッチを変えるには、第１図（ｂ）に示すボル
ト２０に螺合した図示しないす一
ットをゆるめ、主コイル導体１５ａ〜１５ｆ又は補助コ
イル導体１７ａ、１７ｂを移動したのちに締め付ければ
よい。Main coil conductors 151 to 15f, auxiliary coil conductor 17a,
To change the pitch of 17b, loosen the set (not shown) screwed onto the bolt 20 shown in FIG. That's fine.
第２実施例の誘導加熱コイル装置を用いて板幅の異なる
平板を誘導加熱する場合も前記と同様なので説明を省略
する。The case where the induction heating coil device of the second embodiment is used to inductively heat flat plates having different widths is the same as described above, so the explanation will be omitted.
なお、主コイル導体や補助コイル導体の配置や数は第１
実施例や第２実施例に限定されるものではなく、その他
にいろいろな配置方法がある。また、主コイル導体や補
助コイル導体には必ずしも鉄心を取り付ける必要はない
。更に、主コイルと補助コイルとに同一電源から給電す
るようにしてもよい。Note that the arrangement and number of the main coil conductor and auxiliary coil conductor are
The present invention is not limited to the embodiment or the second embodiment, and there are various other arrangement methods. Further, it is not necessary to attach an iron core to the main coil conductor or the auxiliary coil conductor. Furthermore, the main coil and the auxiliary coil may be powered from the same power source.
Ｈ、発明の詳細
な説明したように本発明によれば、主コイル導体のピッ
チを変えて平板を誘導加熱することにより、平板の板幅
方向の中央部と両側部の温度上昇を相対的に調節できる
ので、これによって板幅の異なる平板に切り換えて加熱
を行う場合に、その都度に主コイルを交換する必要がな
い。即ち、主コイル導体どうしのピッチを変えることに
より、容易に平板の板幅方向の温度分布を調整できると
ともに、これによって板幅が変わっても板幅方向の温度
分布を均一に調整でき、板幅か変わっても従来のように
主コイルの交換を必要としないことから設備の停止時間
を減らして稼働率を上げることができる。またそのため
、板幅に応じた各サイズの主コイルを準備する必要もな
い。H. Detailed Description of the Invention According to the present invention, by induction heating the flat plate by changing the pitch of the main coil conductor, the temperature rise at the center and both sides of the flat plate in the width direction can be relatively reduced. Since it can be adjusted, there is no need to replace the main coil each time when switching to a flat plate with a different width for heating. In other words, by changing the pitch between the main coil conductors, the temperature distribution in the width direction of the flat plate can be easily adjusted. Even if the main coil changes, there is no need to replace the main coil like in the past, so it is possible to reduce equipment downtime and increase operating efficiency. Furthermore, there is no need to prepare main coils of various sizes depending on the board width.
また、板幅の変更とは関係なく、一般的に平板を板幅方
向に均一に加熱する場合に、平板の中央部と両側部との
温度の相対的な調整を主コイル導体のピッチの調整によ
って容易に行うことができるので、板幅方向の均熱性を
向上できる効果が大きい。In addition, regardless of changes in plate width, when a flat plate is generally heated uniformly in the width direction, the relative temperature between the center and both sides of the plate can be adjusted by adjusting the pitch of the main coil conductor. Since this can be easily carried out by the above method, it is highly effective in improving heat uniformity in the width direction of the plate.
第１図、第２図は本発明による平板の誘導加熱方法の実
施例に係り、第１図（λ）は第１実施例を示すための誘
導加熱コイル装置の構成図、第１図（ｂ）は第１図（ａ
）の部分拡大図、竿２図は第２実施例を示すための誘導
加熱コイル装置の構成図、第３図は従来の誘導加熱コイ
ル装置を示す構成図、第４図（ａ）、（ｂ）は従来の誘
導加熱コイル装置を用いて板幅の異なる平板を加熱した
場合の温度分布を夫々示すグラフ、第５図〜第７図は板
幅方向の温度分布が異なる理由説明に係り、第５図（ａ
）、（ｂ）は例としてあげた誘導加熱コイル装置の構成
図、第６図、第７図は第５図（ａ）又は第５図（ｂ）の
誘導加熱コイル装置によるものであり、第６図（ａ）、
（ｂ）、（ｃ）は主コイル導体のピッチを変えた場合の
平板の温度分布を示すグラフ、第７図（ａ）、（ｂ）。
（Ｃ）は第６図（ａ）、（ｂ）、（ｃ）と対応して誘起
電流の流路を示す説明図である。
１・・・平板、２．４・・・電源、１３．２２・・・主
コイル、１４．２３−・・補助コイル、１５ａ〜１５ｆ
。
２４ａ〜２４ｄ・・・主コイル導体、１６ａ−１６ｇ。
１８ａ＝１８ｃ、２５ａ〜２５ｅ、２７ａ〜２７Ｃ”・
固定導体、１７ａ、１７ｂ、２６ａ、２６ｂ・・・補助
コイル導体、１９・・・長孔、２０・・・ボルト、Ｗ・
・・板幅、Ｐ ｌ−Ｐ 、・・・ピッチ。
第２図
鮪４籾が一コイ！凶［−ｉｔの膚傘バ回０暦２芙施硬１
）第３図
鰐護ｆ！ｃＪ偲コＡ Ｉｆ、製（で構べ図（従来）第４
図
一？永のｔＬ′Ｉｔ秤斥１示マグラフ
着咋で乃と４（ｍｍ） 版−げシ司
での偵僕（ｒｎｍ）第５図1 and 2 relate to an embodiment of the induction heating method for a flat plate according to the present invention, FIG. 1 (λ) is a block diagram of an induction heating coil device to show the first embodiment, and FIG. ) is shown in Figure 1 (a
), Figure 2 is a configuration diagram of an induction heating coil device showing the second embodiment, Figure 3 is a configuration diagram showing a conventional induction heating coil device, and Figures 4 (a) and (b). ) are graphs showing the temperature distribution when flat plates with different widths are heated using a conventional induction heating coil device. Figure 5 (a
), (b) are configuration diagrams of the induction heating coil device given as an example, and FIGS. 6 and 7 are based on the induction heating coil device of FIG. 5(a) or 5(b). Figure 6(a),
(b) and (c) are graphs showing the temperature distribution of the flat plate when the pitch of the main coil conductor is changed, and FIGS. 7(a) and (b). (C) is an explanatory diagram showing a flow path of an induced current corresponding to FIGS. 6(a), (b), and (c). 1... Flat plate, 2.4... Power supply, 13.22... Main coil, 14.23-... Auxiliary coil, 15a to 15f
. 24a-24d...Main coil conductor, 16a-16g. 18a=18c, 25a~25e, 27a~27C"・
Fixed conductor, 17a, 17b, 26a, 26b... Auxiliary coil conductor, 19... Long hole, 20... Bolt, W.
... Plate width, P l-P, ... pitch. Figure 2: 4 tuna in one carp! Evil [-it's skin umbrella time 0 calendar 2 fuse hard 1
) Figure 3 Wanigo f! cJ Miko A If, made (composition diagram (conventional) No. 4
Figure 1? Ei's tL'It weighs 1 and 4 (mm) edition - Geshitsuka's detective (rnm) Fig. 5
Claims (1)
板幅を越えて延在するとともに平板を挾んで対向する一
対の主コイル導体を平板の長さ方向へ複数組配置して直
交磁束形の主コイルを構成する一方、平板の板幅方向の
両側縁の内側にて平板の長さ方向へ延在するとともに平
板を挾んで対向する二対の補助コイル導体を平板の長さ
方向へ一組以上配置して直交磁束形の補助コイルを構成
し、主コイルと補助コイルとを平板の搬送方向に沿って
配設するとともに主コイル及び補助コイルに通電しなが
ら平板を搬送する平板の誘導加熱方法において、 平板の長さ方向での隣り合う前記主コイル導体間のピッ
チを変化させることにより、板幅方向の温度分布を調節
するようにしたことを特徴とする平板の誘導加熱方法。[Scope of Claims] A pair of main coil conductors that extend in the width direction of a long flat plate conveyed along a conveyance line beyond the width of the plate, and that face each other with the flat plate in between, extend in the length direction of the flat plate. A plurality of sets are arranged to constitute an orthogonal magnetic flux type main coil, while two pairs of auxiliary coil conductors extend in the length direction of the flat plate inside both edges in the width direction of the flat plate and face each other with the flat plate in between. The main coil and the auxiliary coil are arranged along the conveying direction of the flat plate, and the main coil and the auxiliary coil are energized. A flat plate induction heating method for conveying a flat plate, characterized in that the temperature distribution in the width direction of the plate is adjusted by changing the pitch between the adjacent main coil conductors in the length direction of the flat plate. Induction heating method for flat plates.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62085582A JPH07101632B2 (en) | 1987-04-07 | 1987-04-07 | Induction heating method for flat plate |
| US07/053,113 US4778971A (en) | 1986-05-23 | 1987-05-21 | Induction heating apparatus |
| EP87107491A EP0246660B1 (en) | 1986-05-23 | 1987-05-22 | Induction heating apparatus |
| DE3751460T DE3751460T2 (en) | 1986-05-23 | 1987-05-22 | Induction heater. |
| ES87107491T ES2078210T3 (en) | 1986-05-23 | 1987-05-22 | INDUCTION HEATING APPARATUS. |
| KR1019870005130A KR940005462B1 (en) | 1986-05-23 | 1987-05-23 | Induction heating apparatus |
| CA000553367A CA1295376C (en) | 1986-12-03 | 1987-12-02 | Induction heating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62085582A JPH07101632B2 (en) | 1987-04-07 | 1987-04-07 | Induction heating method for flat plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63252382A true JPS63252382A (en) | 1988-10-19 |
| JPH07101632B2 JPH07101632B2 (en) | 1995-11-01 |
Family
ID=13862804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62085582A Expired - Fee Related JPH07101632B2 (en) | 1986-05-23 | 1987-04-07 | Induction heating method for flat plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07101632B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007095651A (en) * | 2005-02-18 | 2007-04-12 | Nippon Steel Corp | Induction heating device and method for metal plate |
| JP2008053010A (en) * | 2006-08-23 | 2008-03-06 | Nippon Steel Corp | Induction heating device and method for metal plate |
| JP2008257927A (en) * | 2007-04-02 | 2008-10-23 | Sumio Matsumori | Transverse-type induction heating coil |
| US8536498B2 (en) | 2005-02-18 | 2013-09-17 | Nippon Steel & Sumitomo Metal Corporation | Induction heating device for a metal plate |
| US9888529B2 (en) | 2005-02-18 | 2018-02-06 | Nippon Steel & Sumitomo Metal Corporation | Induction heating device for a metal plate |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60221986A (en) * | 1984-04-19 | 1985-11-06 | 神鋼電機株式会社 | Crossing magnetic field type induction heater |
-
1987
- 1987-04-07 JP JP62085582A patent/JPH07101632B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60221986A (en) * | 1984-04-19 | 1985-11-06 | 神鋼電機株式会社 | Crossing magnetic field type induction heater |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007095651A (en) * | 2005-02-18 | 2007-04-12 | Nippon Steel Corp | Induction heating device and method for metal plate |
| US8536498B2 (en) | 2005-02-18 | 2013-09-17 | Nippon Steel & Sumitomo Metal Corporation | Induction heating device for a metal plate |
| US9888529B2 (en) | 2005-02-18 | 2018-02-06 | Nippon Steel & Sumitomo Metal Corporation | Induction heating device for a metal plate |
| JP2008053010A (en) * | 2006-08-23 | 2008-03-06 | Nippon Steel Corp | Induction heating device and method for metal plate |
| JP2008257927A (en) * | 2007-04-02 | 2008-10-23 | Sumio Matsumori | Transverse-type induction heating coil |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07101632B2 (en) | 1995-11-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |